Super engineering bacteria, expressed detoxification enzyme thereof, and construction method and application therefor
A technology for super-engineering and construction methods, applied in the fields of botany equipment and methods, microorganism-based methods, biochemical equipment and methods, etc.
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Embodiment 1
[0052] The cloning of the super engineered bacteria containing the genes of cytochrome oxidoreductase P450 CYP9G2 and cytochrome P450 reductase provided by the present invention is as follows:
[0053] 1.1 Plasmid and recipient bacteria
[0054] Cloning of Plutella xylostella CYP9G2 Gene
[0055] 1) Extraction of total RNA
[0056] 1-1) According to the operating procedures of the TRIzol kit, extract the total RNA of diamondback moth larvae: 2 RT-PCR reactions
[0057] 1-2) Perform a PCR reaction using the reverse-transcribed first-strand cDNA as a template, add the following reagents to the PCR reaction tube, and gently mix the reaction system;
[0058] 10×PCR Buffer 2.5μl
[0059] 50mM MgCl 2 0.75μl
[0060] 10mM dNTPs mixture 0.5μl
[0061] Forward primer (10μM) 0.5μl
[0062] Reverse primer (10μM) 0.5μl
[0063] cDNA 1μl
[0064] Taq DNA polymerase (5U / μl) 0.5μl
[0065] autoclaved distilled water 18.75μl
[0066] 1-3) The reaction program of the PCR reaction i...
Embodiment 2
[0126] Add 20ml of water and 1ml of 2% TritonX-100 to a 100ml Erlenmeyer flask, add an appropriate amount of ethanol solution of pesticides to make the final concentration of pesticides 10ppm, add 0.02M, pH 7.0 phosphate buffer to make up the volume, so that the total volume is 10mL. After fully mixing it, add 4 mL of the detoxifying enzyme crude enzyme solution prepared in Example 1 (approximately 30 mg of total protein), and shake on a shaker at 30°C-32°C. Samples were taken at 0min, 20min, 40min, 60min, 80min and 120min. Two repetitions were taken at each time point, and the CYP9G2 P450 single-expressing P450 9G2 enzyme prepared in Example 1 was used as the control group in the experiment. Take out 1ml of the treatment solution and put it in a 5ml test tube, add 1ml of redistilled n-hexane, shake it on the mixer for 3min to mix well, extract, then centrifuge at 6500rpm for 15min, take the supernatant, repeat the extraction once, and take out the supernatant After the liqui...
Embodiment 3
[0137] Add 20ml of water and 1ml of 2% TritonX-100 to a 100ml Erlenmeyer flask, add an appropriate amount of ethanol solution of pesticides, so that the final concentration of fenitrothion pesticide is 10ppm, add 0.02M, pH 7.0 phosphate buffer to make up the volume, so that the total The volume is 10 mL. After fully mixing it, add 4 mL of the detoxifying enzyme crude enzyme solution prepared in Example 1 (approximately 30 mg of total protein), and shake on a shaker at 30°C-32°C. Samples were taken at 0min, 20min, 40min, 60min, 80min and 120min. Two repetitions were taken at each time point, and the CYP9G2 P450 single-expressing P450 9G2 enzyme prepared in Example 1 was used as the control group in the experiment. Take out 1ml of the treatment solution and put it in a 5ml test tube, add 1ml of redistilled n-hexane, shake it on the mixer for 3min to mix well, extract, then centrifuge at 6500rpm for 15min, take the supernatant, repeat the extraction once, and take out the supern...
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